Rugby player in wicked European siege (8)
I believe the answer is:
blockade
'siege' is the definition.
(I've seen this before)
'rugby player in wicked european' is the wordplay.
'rugby player' becomes 'lock' (position in rugby).
'in' means one lot of letters goes inside another.
'wicked' becomes 'bad' (associated in meaning).
'european' becomes 'E' (abbreviation e.g. EU).
'lock' going into 'bad' is 'blockad'.
'blockad'+'e'='BLOCKADE'
(Other definitions for blockade that I've seen before include "clampdown" , "Cut off" , "Seal off (a sea port)" , "Obstruction of access, as to entry of goods" , "Barricade" .)